﻿using System;
using System.Text;

class Reading20Characters
{
    static void Main()
    {
        Console.Write("Enter something: ");
        string text = Console.ReadLine();
        int length = text.Length;

        if (length < 20)
        {
            text += new string('*', 20 - length);
            Console.WriteLine(text);
        }
        else
        {
            Console.WriteLine(text.Substring(0, 20));
        }
    }
}
